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Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
87,891 87,448 29% 37% 23% 11% 18,201 92% 4% 2% 2%
- Simulation Users 5
5,456 2,734 51% 23% 16% 10% 2,734 92% 4% 1% 3%
- Interactive Users 6
24,575 23,802 35% 31% 21% 14% 4,521 96% 3% 1% 0%
- Download Users 7
75,871 75,423 27% 38% 24% 11% 10,345 94% 4% 2% 0%
Total Users (old defn) 8
30,036 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 5,456 users
Simulation Runs 127,006 jobs
Total CPU Time 1,479 days  
Total Wall Time 11,366 days  
Total Interaction Time 2,761 days  
Users with > 10 mins of CPU Time 738 users  
Avg. Number of Simulation Runs/User 23 jobs  
Avg. Time between First and Last Simulation 206,482 days  
Repeat Users with > 10 Simulation Jobs 1,986 users  
Repeat Users with > 3 Months 9 1,217 users  
Table 3: Miscellaneous Statistics
Domains Served 8,550
Cummulative Interactive User Sessions 10 74,091
Cummulative Session Time 4,055 days
Visitors 11 176,068
Visits 12 480,315
New Accounts 4,870
Max User Logins 763 users on 2012-01-30
Web Server Hits 28,561,733
Table 4: Collaboration Usage
Online Meetings 0 meeting sessions
0 participants
Shared Tool Sessions 13 59
New tools under development 15
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
87,891 87,448 29% 37% 23% 11% 18,201 92% 4% 2% 2%
- Registered Users 2
8,043 8,041 49% 26% 16% 9% 8,040 89% 6% 1% 4%
- Unregistered Interactive Users 3
14,137 13,895 27% 35% 23% 14% 1,695 95% 3% 2% 0%
- Unregistered Download Users 4
65,711 65,512 26% 39% 24% 10% 8,466 95% 3% 2% 0%
  1. Sum of Registered Users2, Unregistered Interactive Users3 and Unregistered Download Users4
  2. Number of Users that logged in. User registration assigns a unique login to each individual user.
  3. Number of Unregistered Users, identified by unique hosts/IPs, that had an active Session 10 without logging in. Does not include known web bots/crawlers.
  4. Number of Unregistered users, identified by unique hosts/IPs, that had an active session of less than 15 minutes without logging in and downloaded a non-interactive resource such as PDF or podcast. Does not include web bots/crawlers.
  5. Number of Registered Users2 that ran one or more simulation runs.
  6. All Unregistered Users, identified by unique hosts/IPs, that had an active Session 10. Does not include known web bots/crawlers.
  7. All Unregistered users, identified by unique hosts/IPs that downloaded a non-interactive resource such as PDF or podcast. Does not include known web bots/crawlers.
  8. Sum of Simulation Users 5 + Unregistered Interactive Users 3 including web bots/crawlers.
  9. Number of Simulation users that returned after a gap of 3 months.
  10. Begins when an IP is active on the site for at least 15 minutes. Ends when inactive for more than 30 minutes, including time spent viewing videos.
  11. Identified by a unique IP address / hostname.
  12. Based on MIT OCW metric of Visits: A visit is activity by a unique visitor delimitated by a 30 minute absence from the site on either side of the activity.
    These visits correspond to unique visitors 11. Does not include known web bots/crawlers
  13. Number of Simulation sessions that were shared between 2 or more users.

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